Disobedience by Design — Regina Kammer

The Lady...
Lady Sophia Harwell has just been presented to Society-and its eligible bachelors-and is quite unimpressed. Her parents are encouraging the suit of the Duke of Royston, a man older than her father Yet free-spirited Sophia is smitten with Joseph, her brother's handsome American business partner, a man who introduces her to sensual delights beyond the bounds of propriety and the dictates of her social standing.

...And The Laborer
Joseph Phillips is out of his depth amongst the British aristocracy trying to secure investors for his American railroad enterprise. To make matters worse, he can't keep his hands off his business partner's sister. Sophia is far out of his league and expected to marry a duke. But when the duke reveals his villainy, Joseph decides some risks are worth taking, and, to protect Sophia, he embarks upon a partnership of an entirely unexpected nature.